/* SPDX-License-Identifier: GPL-2.0-or-later */ /* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * ocfs2_buffer_head.h * * Buffer cache handling functions defined * * Copyright (C) 2002, 2004 Oracle. All rights reserved. */ #ifndef OCFS2_BUFFER_HEAD_IO_H #define OCFS2_BUFFER_HEAD_IO_H #include <linux/buffer_head.h> int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh, struct ocfs2_caching_info *ci); int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, unsigned int nr, struct buffer_head *bhs[]); /* * If not NULL, validate() will be called on a buffer that is freshly * read from disk. It will not be called if the buffer was in cache. * Note that if validate() is being used for this buffer, it needs to * be set even for a READAHEAD call, as it marks the buffer for later * validation. */ int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr, struct buffer_head *bhs[], int flags, int (*validate)(struct super_block *sb, struct buffer_head *bh)); int ocfs2_write_super_or_backup(struct ocfs2_super *osb, struct buffer_head *bh); #define OCFS2_BH_IGNORE_CACHE 1 #define OCFS2_BH_READAHEAD 8 static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off, struct buffer_head **bh, int (*validate)(struct super_block *sb, struct buffer_head *bh)) { int status = 0; if (bh == NULL) { printk("ocfs2: bh == NULL\n"); status = -EINVAL; goto bail; } status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate); bail: return status; } #endif /* OCFS2_BUFFER_HEAD_IO_H */